Possible warnings (11)

kernel/printk/printk.c:183:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
kernel/rcu/srcutree.c:148:32: warning: 'levelspread[<U70a0>]' may be used uninitialized in this function [-Wuninitialized]
drivers/base/regmap/regmap.c:2511:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
drivers/base/regmap/regmap.c:1833:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized]
net/bridge/br_netlink.c:637:7: warning: 'err' may be used uninitialized in this function [-Wuninitialized]
fs/udf/unicode.c:132:8: warning: 'c' may be used uninitialized in this function [-Wuninitialized]
drivers/net/tun.c:1835:30: warning: 'copylen' may be used uninitialized in this function [-Wuninitialized]
drivers/net/tun.c:1745:46: warning: 'linear' may be used uninitialized in this function [-Wuninitialized]
drivers/tty/serial/8250/8250_core.c:251:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized]
net/mac80211/mlme.c:1353:3: warning: 'pwr_level_cisco' may be used uninitialized in this function [-Wuninitialized]